Highscore, Achievements, Leaderboards: GameCenter / Steam / Social Media integration base

[sabvdf]

Some basic highscore / achievements client/server
Some global system that can integrate with GameCenter, Steam, Facebook, Google, Twitter, and maybe others (base components easily extendable with specific components for each platform) at least for login, matchmaking, leaderboards, achievements and social sharing.

[sabvdf]

Something to consider for cross-platform: Facebook Scores API and Achievements API
https://developers.facebook.com/docs/howtos/scores/
https://developers.facebook.com/docs/howtos/achievements/